Light decolorizable recording material, ink and toner

Abstract

A light decolorizable recording material comprising a colored dye having absorptions in the visible light region and a boron compound represented by the general formula (1), ##STR1## wherein R 1 , R 2 , R 3 and R 4 each independently represents an alkyl, aryl, allyl, aralkyl, alkenyl, alkynyl, silyl, heterocyclic, substituted alkyl, substituted aryl, substituted allyl, substituted aralkyl, substituted alkenyl, substituted alkynyl or substituted silyl group, and Z + represents a quaternary ammonium, quaternary pyridinium, quaternary quinolinium or phosphonium cation.

We claim: 
     
       1. A decolorizable toner consisting of a light decolorizable recording material said recording material consisting of: (i) at least one of a wax and a resin;   (ii) an electrically neutral dye having absorptions in the visible light region; and   (iii) a boron compound represented by the general formula (1): ##STR120## wherein R 1 , R 2  and R 3  each independently represent an alkyl group, an aryl group, an allyl group, an aralkyl group, an alkenyl group, an alkynyl group, a silyl group, a substituted alkyl group, a substituted aryl group, a substituted silyl group, or a heterocyclic group; R 4  represents an alkyl group, an allyl group, an aralkyl group, an alkenyl group, an alkynyl group, a silyl group, a substituted alkyl group, a substituted silyl group, or a heterocyclic group; and Z +   represents a quaternary ammonium cation, a quaternary pyridinium cation, a quaternary quinolinium cation or a phosphonium cation.   
     
     
       2. A decolorizable toner according to claim 1, wherein the boron compound is present in an amount of 0.01 to 20% by weight based on 1% by weight of the electrically neutral dye. 
     
     
       3. A decolorizable toner according to claim 1, wherein said toner is decolorizable by visible light. 
     
     
       4. A light decolorizable recording material consisting of: (i) at least one of a wax and a resin;   (ii) an electrically neutral dye having absorptions in the visible light region; and   (iii) a boron compound represented by the general formula (1): ##STR121## wherein R 1 , R 2  and R 3  each independently represent an alkyl group, an aryl group, an allyl group, an aralkyl group, an alkenyl group, an alkynyl group, a silyl group, a substituted alkyl group, a substituted aryl group, a substituted silyl group, or a heterocyclic group; R 4  represents an alkyl group an allyl group, an aralkyl group, an alkenyl group, an alkynyl group, a silyl group, a substituted alkyl group, a substituted silyl group, or a heterocyclic group; and Z +   represents a quaternary ammonium cation, a quaternary pyridinium cation, a quaternary quinolinium cation or a phosphonium cation.   
     
     
       5. A light decolorizable recording material according to claim 4, wherein the boron compound is present in an amount of 0.01 to 20% by weight based on 1% by weight of the electrically neutral dye. 
     
     
       6. A light decolorizable ink consisting of: (i) at least one of a wax and a resin in combination with an agent selected from the group consisting of a) a solvent and b) a solvent and a drying oil;   (ii) an electrically neutral dye having absorptions in the visible light region; and   (iii) a boron compound represented by the general formula (1): ##STR122## wherein R 1 , R 2  and R 3  each independently represent an alkyl group, an aryl group, an allyl group, an aralkyl group, an alkenyl group, an alkynyl group, a silyl group, a substituted alkyl group, a substituted aryl group, a substituted silyl group, or a heterocyclic group; R 4  represents an alkyl group, an allyl group, an aralkyl group, an alkenyl group, an alkynyl group, a silyl group, a substituted alkyl group, a substituted silyl group, or a heterocyclic group; and Z +   represents a quaternary ammmonium cation, a quaternary pyridinium cation, a quaternary quinolinium cation or a phosphonium cation.   
     
     
       7. A decolorizable ink according to claim 6 which is decolorizable by visible light. 
     
     
       8. A decolorizable ink according to claim 6, wherein the boron compound is present in an amount of 0.01 to 20% by weight based on 1% by weight of the electrically neutral dye. 
     
     
       9. A light decolorizable ink according to claim 6, wherein the agent is a solvent and a drying oil. 
     
     
       10. A light decolorizable ink according to claim 6, wherein the agent is a solvent.